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Chapter 28: Digital Signal Processors

Digital Signal Processing is carried out by mathematical operations. In comparison, word
processing and similar programs merely rearrange stored data. This means that computers
designed for business and other general applications are not optimized for algorithms such
as digital filtering and Fourier analysis. Digital Signal Processors are microprocessors
specifically designed to handle Digital Signal Processing tasks. These devices have seen
tremendous growth in the last decade, finding use in everything from cellular telephones
to advanced scientific instruments. In fact, hardware engineers use "DSP" to mean
Digital Signal Processor, just as algorithm developers use "DSP" to mean Digital Signal
Processing. This chapter looks at how DSPs are different from other types of
microprocessors, how to decide if a DSP is right for your application, and how to get
started in this exciting new field. In the next chapter we will take a more detailed look
at one of these sophisticated products: the Analog Devices SHARC? family.